Electric switch



Sept. 30,1930. A 1,777,067

ELECTRIC SWITCH Filed Dec. 17, 1 2

INVENTOR ATTORN EYS Patented Sept, 30, 19 3 I i UNITED STATES OFCHICAGO, ILLINOIS, A connonnrronfor NEW' JERSEY ELECTRIC swrro'n f i aApplication filed December 17 1ieeflseriailit .i55;a7c. I,

Myinvention relates to improvements in electric switches-particularlyfor use in connection with locomotive electricsystems and has for oneobject to provide a new and improved form of electric switch wherein theswitch member may be easily moved by the operator from. the on to theoff position and vice versa and wherein the switch mechanism willpositively remain in the position in which it was placed by theoperator. Another object is to provide a switch arrangement which willbe fool proof and durable so as to stand up under the very difficultproblems of railroad service. Other objects 5 will appear from time totime throughout the specification and claims.

My invention is illustrated more or less diagrammatically in theaccompanying drawhaving flanges A about which the housing may be mountedin place] A cover A outwardly flanged at A inwardly flanged at A andprovided'with a dust tight packing strip A screws A may be used tofasten the cover in place to close the box. On either side of the boxare hollow lugs A in this case associated with the lugs A onto whichconduits may be screwed to contain the conductor A On another side ofthe box is a hollow boss A serving as a guide for the switch handle.

. B is an insulating block contained within the housing. Upon thisinsulating block} are mounted binding posts B to which lead theconductors A Associated with these binding posts are inwardly extendingspring fingers B which never come in contact one with the other. B is asliding'insulating block, adapted to travel on the block B.

This block carries a conducting jacket B so Figure 1 is a plan View inpart section with arrangedithat'when'thepartsare in the position shownin fulllines in, Figure '1, the con ducting "jacket is out j j of,contact, whenfin the position; shown n dotted lines the con tfactingjacket engagesb'oth fingers and closes ajcircuitbetweeil them. ,It willbe noted that thisblock ista ered as ensue insurej'easy n e em jwi lifthispri g fi e 1 This sliding'b'l'ock B is guided the fixed insulatingbloclc .B .-and is held therein'by meansof a spring plate B which springplate terminatesin a lock finger B adapted to engage an enlargement B onthe block B C is the switch handle comprising a cylindrical portionadapted to travel in and be guided by the sleeve A ,a hand button C anda squared shank (Pfrom which shankprojects a switch controlling rod Gwhich rod is slidable in the block B The block B is recessed around thisrod and a coil spring C is interposed between the bottom of one of therecesses and the member C and a spring C between thebottom of the otherrecess and a head C so that the connection between the hand piece andthe sliding block is a spring connection and not a positive con nection,the result being that there is certain freedom of movement with respectto the sliding block and a push or pull on the hand piece while it issuflicient to shift the block into or out of position.

I claim:

JOHN A. AMOS, or cHIcAG ILLInors, ASSIGNOR T0 THErYtn A'rioNAncoMrAnY;

1. A switch comprising an insulating supporting block, a rectangularinsulating block adapted to slide on the supporting block, having itslonger axis parallel with its direction of sliding, recesses in linewith the major axis of the block terminating short of the center of theblock and a relatively small aperture joining such recesses, a pinextending through the recesses and apertures, springs one in eachrecess, surrounding the pin, each abutting at one end in the bottom ofthe recess, and at the other end, on the pin, a handle whereby the pinmay be longitudinally moved, the ends of the block removed from thehandle being forwardly tapered, a conducting jacket .encircling theblock and terminating short of the ends there of, the jacket beingupwardly bulged on one side of the block only, two opposed leafconducting springs extending into the path of the block, adapted to bewedged apart thereby and adapted when the block is in one position toengage the conducting jacket and when the block is in the opposedposition, to be out of contact therewith, a holding spring adapted toengage the bulge on the jacket to hold the block in a retracted positionand an insulating support for said spring. 7

2. A switch comprising an insulating supporting block, a switch blockslidable thereon, a thin conducting jacket encircling the switch blockand upwardly bulged on one side thereof, means for moving the blocklongitudinally, an insulated holding spring adapted to engage the bulgeon the jacket, two opposed conductor springs adapted when the block isin one position to both engage the jacket on opposed sides of the block,and adapted When'the block is in the retracted position to be out ofcontact with the jacket.

Signed at Chicago, county of Cook and State of Illinois, this 10th dayof December,

JOHN A. AMOS.

